diff --git a/lib/manager/kustomize/readme.md b/lib/manager/kustomize/readme.md
index 28ceebdcb3099abe22a54f0786326d6ee4c35c01..fb8896ce871fe7a4bfb2a8bba7171cfc81ee587b 100644
--- a/lib/manager/kustomize/readme.md
+++ b/lib/manager/kustomize/readme.md
@@ -13,7 +13,7 @@ This package will manage two parts of the `kustomization.yaml` file:
 **Limitations**
 
 - Needs to have `kind: Kustomization` defined
-- Currently this hasn't been tested using https to fetch the repos
+- Currently this hasn't been tested using HTTPS to fetch the repos
 - The image tags are limited to the following formats:
 
 ```